本論文主要建立一個太陽能高效率轉換系統，其基於太陽能最大功率追蹤，設計具有軟切換特性的直流轉換器用於提升整體太陽能源的使用效率。本文所提出的系統主要分為兩個部分，第一部分是最大功率追蹤策略的探討，分析各種最大功率追蹤的技術的特性與優缺點，並透過擷取輸入電壓與輸入電流的數據獲得功率與電壓的關係曲線來追蹤最大功率峰值，藉由最大功率追蹤技術使當下所提供的太陽能源可以有最大限度地運用，第二部分是設計具有軟切換特性的直流升壓轉換器，用以實現最大功率追蹤並將輸入的太陽能提升到後端直流母線所需的電壓值。直流升壓轉換器使用的是零電壓切換技術，透過第二顆輔助開關與諧振電路，使主電路開關的電壓先降至零後再將其開啟，使其中的切換損耗降至最低；其中，第二顆輔助開關的時間會透過單晶片內的演算法判斷是否為最佳的切換時間，在此藉由軟切換技術將其耗損降至最低，結合前後兩部分以實現太陽能源的高效率轉換系統。;This thesis mainly establishes a high-efficiency solar power conversion system, and cooperates with maximum power point tracking control and DC/DC boost converter with soft switching characteristics to improve the efficiency of the overall solar power generation system. The system proposed in this thesis is mainly divided into two parts. The first part is the discussion of the maximum power point tracking strategies. It analyzes the characteristics, advantages and disadvantages of various maximum power point tracking technologies. The second part is an investigation of DC/DC boost converter with soft switching characteristics to achieve maximum power point tracking and improve the input solar source to the voltage value required at the DC bus. Using zero-voltage switching technology, the voltage of the main circuit switch is first reduced to zero and then turned on to minimize the switching loss through the second auxiliary switch and the resonant circuit. The operation time of the second auxiliary switch is determined by the algorithm in the single chip to determine the best switching time. The soft-switching technology minimizes its switching loss, and combing the two parts to achieve a high-efficiency conversion system for the solar source.
